don't understand

i dont understand. how people smile all day long, but cry themselves to sleep. how pictures never change, but the people in them do. how your best friend can become your worst enemy, but the memories you hold on to. how forever turns into a few short months, that you'd do almost anything to get back. how you can let go of something, you once said you couldn't live without. how people who once wanted to spend every second with you, think a moment's too much to spare. how a person’s smell stays with you, even when they're not there. how no one will take the blame, but everyone wants the credit. how people make promises, they know will never happen. how people can erase you from their lives, just 'cause it's easier then working things out. how the ones who hurt you the most, are the ones that are so close. how the ones who truly understand you, never seem to know it; and the ones who always wanted to, never really will. how the ones who are distant, never seem to leave; and the ones who get too close, make it hard to breathe. how you make so many plans, you know will never happen; and what always seems to happen, isn't what you planned. how you know so many people, but feel like no one's there. how t